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The S&K mount is supposedly one of the better one's out there (B-square is the alternative). I just picked one up on the EE forum from a fellow member and hope to try it out soon as it gets here. Here's a write up: http://www.surplusrifle.com/reviews2005/sk98kmount/index.asp
There are a couple reviews on the Gunboards K98 forum from guys that have used them. Supposedly they are solid steel mounts (but a little heavy) that will hold zero just fine. Also, you aren't limited to LER scopes with it.